The field guide · How a rug is built
Depressed warps
Warps are depressed when alternate warps lie on a lower level than their neighbours, because one weft of each pair is pulled tighter than the next: the weaver works the wefts, and the warps show the result. On the back one node of each knot is then partly hidden. If neither weft is pulled taut the warps lie level, or flat, and both nodes of every knot show. The degree of depression is one of the structural traits used to group rugs by region. The Persian grade names (takht-baft, nim-lool, lool-baft) describe how the rug is woven; English books name the result, in the warps.
Also offset warps · warp depression · two-level warps
See also Double-wefted, Single-wefted, Handle
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